Differential gearing



(No Model.)

D. FYPE. DIFFERENTIAL GBARING.

No. 605,416. Patented June '7, 1898.

W/TNESSES A TTOHNE Uivrrnn Sterns 'AF-Artnr @urina DANIEL trim, or covINeToN, TENNESSEE.A

DIFFERENTML eEAalNe,

SPECIFICATION forming part of Letters Patent No. 605,416, dated J une '7, `1898.

` t Application inea February 10,1898. serial No. 669,826. (No model.)

To @ZZ whom it may concern.- Be it known that I, DANIEL FYFE, of Covington, in the county of Tipton and Stateof Tennessee, have invented a new and Improved Differential Gearing, of which the fol-'` lowing is a full, clear, and exact description.

The invention relates to mechanical movements; and its object is to provide a new and improved differential gearing arranged to transmitpower very effectively and without undue friction between the working parts.

'Ihe invention consists of novel features and parts and combinations of the same,'as will be fully described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of thisspecication, in which similar characters of reference indicate corresponding parts in all the figures.Y

Figure l is a crosssectiou of the improvement on the line l l of Fig. 2. Fig. 2 is a sectional side elevation of the same on the line 2 2 of Fig. 3, and Fig. 3 is a transverse section of the improvement with the parts in a different position.

The improveddifferential gearing is provided with two shafts A and B in alinement with each other, the shaft A being hollow for receiving the hollow reduced end B' ofthe shaft B. A coil-spring C is held in the reduced end B and extends with its forward end through a longitudinal slot B2, formed in the wall of the reduced end B', and passes into an annular recess A', formed on the inside of the shaft A. By this arrangement the two shafts A and B are yieldingly coupled to permit of using different-sized pinions, as hereinafter more full;T described, and at the same time the shafts can rotate independently of each other but when one is shifted longitudinally the other moves with it.

As shown in Figs. l, 2, and 3, the shaft B is provided with an annular recess B3, into whichfits loosely a ring D, connected in the usual manner with a shifting fork E for imparting longitudinal movement to the shafts A and B for the purpose hereinafter more fully described.,

On the shaft B, near its reduced end B', is'

secured or formed a disk, spider, or other support F, in which is journaled a plurality of radially-arranged shafts G, each carrying two beveled pinions H and I of different diameters,

but turning with the shaft, the latter being for this purpose made polygonalin cross-section'to fit` the correspondingly-shaped bores of the pinions H and I. Eachshaft G can be Vconveniently removed from thelsupport to zpermit of placing'different-sized pinions on thershaft when a different rate of speed'is desired.

The pinion H is atall times in mesh with a bevel gear-wheel J, secured or formed on the end of the hollow shaft A,and said pin ion H is adapted tebe moved in or out of mesh with a bevel gear-wheel K, arranged opposit-e the gear-wheel J and secured to a frame L, held in a fixed position by any suitable means. The other pinioif-I is adapted to move in or out of mesh Vwith a bevel gearwheel K', likewise fixed to the frame L and arranged on the same side as the wheel J, so that when the pinion H is in mesh with its gear-wheel K the other pinion I is out of mesh with its gear-wheel K', (see Fig. 1,) and when the pinion I is in mesh with the gear-wheel K', as shown in Fig. 3, then the pinion H is outofmesh with its gear-wheel K.

,-Now it is evident that when the shaft A is rotated the gear-wheel J rotates the pinion H, the shaft G, and the pinion I, and when the pinion H is in mesh with the gear-wheel K, as shown in Fig. l, it rolls off on this fixed and when the pinion I is in mesh with its fixed gear-wheel K" then an opposite motion. and

gear-wheel, and consequently a rotary motion -is given to thesupport F and to the shaft B,

different speed is transmitted to the shaft B 4 Aasrthe smaller pinion I rolls off on the fixed gear-wheel K'. On the other hand, if the shaft. B is rotated the support F carries around the pinions I-I and I, which then roll off on either of the fixed bevel gear-wheels K or K', respectively, and at the same time impart a rotary motion to the bevel gearwheel J to rotate theshaft A.

By the arrangement described a very simple differential gearing is produced and arranged in such na manner as `to transmit power very effectively without undue friction. By the use of the spring C, I am enabled to use different-sized pinions H and I on the shafts G without changing the rest of the device, as it t is evident that the spring C will yield longi- IOO tudinally to permit of moving the shafts A and B farther apart or closer together, according to the size of the pinions II and I which are employed. It is, however, expressly understood that whatever the size of the pinions used one "is always in mesh with'the gear-wheel J, and only one of the pinions at a time is in mesh with a corresponding fixed gear-wheel..

The pinions H and I, as well as the gearwheels K K', may be of the same diameters should different speed or other circumstances i require such selections.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A differential gearing comprising two alined shafts arranged to rotate independently of each other, and oneof which is provided with a gear-Wheel and the other with a support carrying pinions, one of which pinions is in mesh with said gear-wheel, and fixed gear-wheels of different diameters, adapted to be alternately engaged by said pinions, substantially as shown and described.

2. A differential gearing comprising two alined shafts arranged to rotate independently of each other, and yieldingly connected with each other to permit of shifting the shafts longitudinally, one of the shafts being provided with a gear-wheel and the other with a support, pinions j ournaled in said support, one of said pinions being in mesh-with the gear-wheel on the shaft, and fixed gearwheels of dierent diameters, adapted to be engaged alternately by said pinions, substantially as shown and described.

3. A differentialgearing comprising two alined shafts arranged to rotate independently of each other, and yieldingly connected with each other to permit of shifting the shafts longitudinally, one of the shafts being provided vwith a gear-wheel and the other with a support, pinions journaled in said support,

one of said pinions being in mesh with the' gear-wheel on the shaft, fixed gear-wheels of different diameters, adapted to be engaged alternately by said pinions, and means for moving the shafts longitudinally, to bring said pinions in mesh with either of said fixed gear-wheels, one of said pinions, however, remaining in mesh at all times with the gearwheel on the shaft, substantially as shown and described.

DANIEL FYFE,

A Witnesses: 

